Well pumping rig



Sept. 17,1935. J, R N I 2,014,653

WELL PUMPING RIG Filed Aug. 51, 1933 3 Sheets-Sheet l Jam LoAg Sept. 17,1935. J R. LONG WELL PUMPING RIG Filed Aug. 51, 1935 5 Sheets-Sheet 2Sept. 17, 1935.

Filed Aug. 51, 1955 5 Sheets-Sheet 3 dummy;

Patented Sept. 17, 1935 UNITED STATES (PATENT OFFICE Application August31,

3 Claims.

This-invention relates to new and useful improvements in well pumpingrigs.

In the pumping of oil wells it is customary to employ a walking beam.The polish rod of the well is suspended from one end of the beam and thebeam is rocked by a pitman operated by a crank fastened on one end ofthe shaft, whichin turn is revolved by a band wheel driven from thepower plant by a belt or the like. Because of the depth of many of thewells, counter-balancing weights are secured to the shaft to off-set thejerk due to the down stroke of the pump rods. Frequently wells belongingto a single owner are located in close proximity, butunless an expensivepower plant is used, each well must be equipped with a walking beam anda separate power unit.

One object of the invention is to provide im proved means foreconomically pumping a number of adjacent wells by driving their pumpjacks from the same shaft which operates the walking beam, so that theusual power unit for one well may be utilized in pumping a number ofwells, thereby saving power, reducing the cost of equipment and savingexpense in maintenance.

Another object of the invention is to eliminate the counter-balancingweight by utilizing the lifted load in the other wells, thereby applyingthe usually wasted power to lift the oil in the adjacent wells.

A further object of the invention is to provide means for taking up orabsorbing the whip and vibrations in the surface rod line, thus makingformore uniform and steady operation. 7

Still another object of the invention is to provide a pumping rigwherein adequate lubrication is obtained and frictional losses arereduced to a minimum together with the production of a strudy andefficient structure.

Arconstruction designed to carry out the invention will be hereinafterdescribed, together with other features of the invention.

The invention will be more readily understood from a reading of the.following specification and by reference to the accompanying drawings inwhich an example of the invention is shown, and

Figure 5 is a perspective view of one of the stroke posts,

Figure 6 is a detail of one of the pivot pins,

Figure '7 is a perspective viewpf one of the rockers,.

Figure 8 is a perspective view of the stroke post bearing block,

1933, Serial No. 687,636

Figure 9 is a plan view of one of the post heads, Figure 10 is ahorizontal cross-sectional view taken onv the line iii-l ll of Figure 5,

Figure 11 is a side elevation of another form in which the invention maybe carried out,

Figure 12 is an end elevation of the same, and Figure 13 isan enlargedhorizontal cross-sectional view taken on the line l3-l3 of Figure 12. Inthe drawings the numeral l0 designates the shaft on which a band wheelis mounted. This 1 wheel (not shown) is revolved by the power unit andin turn revolves the shaft. The crank and pitman which operate thewalking beam are mounted on one end of the shaft and in carrying out theinvention I fasten a crank H on the op- 15 posite end of said shaft. Onthe outer end of the crank is mounted a wrist pin I2, as is best shownin Figure 4. A flanged sleeve I3 is fastened on the pin by a flanged nut14. By this means the pin is securely fastened to the crank; however anytype of pin may be used.

7 An elongated crosshead I5 is provided with a central collar or hub IS.A flanged bushing I! is driven into the collar and is journaled on thesleeve l3. A suitable ,oil cup I8 is mounted on the hub for oiling thebearing. The crosshead is formed of a pair of spaced side plates l5united by the hub. Gudgeons l9 are pivoted in the ends of the headbetween the plates. The head may be formed in any manner suitable toreceive the gudgeons. Each gudgeon is preferably made fiat and mountedvertically between the plates Iii so as to provide broad bearingsurfaces. The gudgeons are provided with bushings 2B and pivot pins 2|fastened in the head are mounted therein. 35.

Each pin 2! has a mutilated flanged head 22 engaging a lug 23 cast onthe side plate l5, whereby the pin is held against rotation. Each pin isfastened by a nut 24 and is provided with an oil duct 25 (Figure 6)leading from its head to its bushing. An oil cup 26 mounted in theflanged head supplies oil by way of the duct to the bushing. Thelubrication is very important because of the heavy loads. The cups areconvenient and require less attention than other means. The bushingswhich are usually of bronze are an important feature, as they reducefrictional losses and conserve power.

Each gudgeon is provided with a screw- 'threaded shank 21 for receivinga collar 28, whereby it may be coupled to a pitman 29. The opposite endof each pitman is coupled by a collar 30 with the shank 2'! of a gudgeonI9, similar to the gudgeons l9. It will be seen that by removing thecollars either gudgeon may be 55 removed and further old tubing orshafting may be used for the pitman. Also the flat gudgeons with theirbroad bearing surfaces and bushed bearings are made possible.

Each gudgeon I9 is pivoted in the head 3| of 60 a stroke post 32. Thesame type of pin 2| is used and lugs 23 hold them against rotation. Eachhead is formed of two plates 3| similar to the head I5, but these platesare united by 2. depending cap 33 internally screw-threaded to receivethe upper end of the post 32, which may be made of tubing or shafting.The lower end of the post is screwed into the central socket 34 of arocker 35 journaled in a bearing block 36 and held by a cap 31.

A second gudgeon l9a is journaled in the head 3| the same as the othergudgeons. Oil cups 38 supply oil to the pins 2| of the head 3|, like thecups 26. Each gudgeon I9a. has a headed shank 39. -The pump rods 40 areconnected to the shanks 39 by clamps 4|. Where necessary the rods 46 aresupported on guide rollers 42 carried by posts 43. It is obvious, as isshown in Figure 1, that the stroke posts 32 may vary in height accordingto the elevation of the pump rods.

When the crank H is revolved the crosshead l will be swung thereby andowing to its pivot on the pin 2| and its pivotal connection with thepitman 29, will aline itself according to the load. In Figure l thecrank is shown as revolving in a counter-clockwise direction and theload or pull is on the right hand rod 40. The left hand rod 40 is beingpulled by the pump jack and Well rods (not shown) which are on the downstroke. The stroke posts swing the pitman in unison with the crank, thustaking vibration and causing a uniform stroke. It would be possibleto'have both pitmen under load so as to counter-balance the walking beamwhen its pump rods are on the down stroke. In Figures 11 to 13, I haveshown another structure for carrying out the invention. This form isparticularly adapted when the rods are on the ground and adjustment ofthe stroke is desirable. A crank 50, similar to the crank II, is mountedon the shaft l0, which carries the band wheel (not shown). This crank isformed with a. radial boss 5| which is provided with a plurality ofholes or openings 52. A pitman 53 has one end pivotally mounted on a pin53 in one of the openings 52. The other end of the pitman is secured bya collar 54 to a gudgeon 54, similar to the gudgeons IS. The gudgeon ispivoted to a swinging member 55 in the same manner as the gudgeons I9are mounted, that is, it is mounted on the pin 2|.

The swinging member 55 includes a pair of vertical channel bars 56 whichare secured together at their center positions by a spacer block 51.Filler blocks 58 of the same size as the spacer block (Figure 13) aresecured in the channels and serve to'provide sufficient bearing spacefor a rocker shaft 59 to extend therethrough. The shaft is mounted inbearing blocks 59 and are held therein by caps 60'. The blocks aresecured to standards 6|) extending upwardly from the ground. Thus, itwill be seen that the member 55 is'mounted to swing in an are as thepitman'53 reciprocates. Suitable reinforcing or back bars 55' may besecured to the outer sides of the channel bars 56'to reinforce saidbars, as well as to give added weight at theircentral portions. 7

The lower end of the channel bars are provided with a-plurality of holes52 on one side thereof. A gudgeon 63, similar to the gudgeon l9a,.1spivoted on the pin 2| in one of these holes and is secured by the clampto a pumping rod 45. A second set of holes 64 is provided in thechannels opposite to the holes 62 and another gudgeon 63 is pivoted inone of these holes. This gudgeon has connection with another pump rod40. The particular details of the gudgeons and their mounting, shown inFigures 11 to 13,

.have not been described, for since they are similar to the gudgeonsshown in Figures 1 to a detailed description would merely be arepetition.

It is pointed out that all the parts are sufiiciently 10 lubricated byoil cups.

By observing Figure 11, it is obvious that as the crank 50 revolves thepitman 53 will reciprocate to swing the member 55. Thus, the pump rods40 secured to the lower end of the member will also be reciprocated topump the adjoining wells. If it is desired to vary the pump stroke ofeither or both of the rods 40, it is only necessary to secure theirrespective gudgeon in a different hole. The openings 52 in the boss ofthe crank 50 permit varying the stroke of the pitman 53. A quick andeasy adjustment can be made and a desired stroke of the rods 40 is hadat all times.

The description which has been given recites more or less detail of aparticular embodiment of the invention, which is set forth as new anduseful, however, I desire it understood that the invention is notlimited to such exact details of construction, because it is manifestthat changes and modifications may be made, within the scope of theappended claims, without departing from the spirit of the invention.

What I claim and desire to secure by Letters Patent, is: 85

l. A pumping rig comprising, a crank, a crosshead journaled on the crankand including a pair of side plates suitably secured together, a pair ofgudgeons pivotally secured to each end of the plates, oppositelyextending push and pull pitmen secured to the gudgeons, swinging memberspivoted to the pitmen, and means for pivotally connecting pump rods tothe swinging members, whereby reciprocation of the pitmen by therotation of the crank will reciprocate the pump rods. 1

2. A pumping rig comprising, a crank, a crosshead journaled on thecrank, oppositely extending push and pull pitmen pivotally connected tothe crosshead, stroke posts each having a head at its upper end andmounted to be rocked, each head including a pair of side plates spacedapart and secured to each other, a gudgeon pivoted between the plates atone end thereof and connecting one end of the adjacent pitman therewith,and a second gudgeon pivoted in said plates at their opposite ends forpivotally connecting the post with a-pump rod.

3. A pumping rig comprising, a crank arm revolving in a vertical orbit,a horizontal pin on the outer end of the crank arm, a crosshead pivotedon the pin and having flat sides substantially parallel to the verticalside of the arm, gudgeons pivoted in each end of the crosshead, push andpull pitmen extending laterally on each side of the arm, means forcoupling each pitman to one of the gudgeons, and vertical swing postsmounted on each side of the arm having cross heads at their upper ends,each of said last named crossheads having a pivotal connection in oneend coupled to the adjacent pitman and a rod clamp pivoted in the otherend.

JON R. LONG.

